Minecraft:Java Edition 16w20a

16w20a is the first Minecraft:snapshot for Minecraft:Java Edition 1.10, released on May 18, 2016,<ref name="16w20a-blog">https://web.archive.org/web/20161201000000*/http://www.mojang.com/2016/05/minecraft-snapshot-16w20a/</ref> which adds bone, magma, and Minecraft:Nether wart blocks; Minecraft:husks and Minecraft:strays as Minecraft:zombie and Minecraft:skeleton variants, respectively; Minecraft:polar bears; and Minecraft:fossils that spawn underground.

Additions

Blocks

File:Bone Block (UD) JE1 BE1.png Minecraft:Bone blocks

• Crafted by filling a 3×3 square in the crafting table with Minecraft:bone meal.
  • Can be crafted back into 9 bone meal.
• Found underground in Minecraft:desert and Minecraft:swamps as part of Minecraft:fossils.

File:Magma Block JE1.gif Minecraft:Magma blocks

• Found in the Minecraft:Nether, generating 4 blobs per chunk between Y=27 and Y=36.
  • It has a similar frequency to blocks like Minecraft:andesite in the Minecraft:Overworld.
• Crafted using four Minecraft:magma cream.
• Minecraft:Mobs and Minecraft:players take Template:Hp damage every second while touching it, similar to a Minecraft:cactus.
  • Unlike cactus or Minecraft:fire, this block doesn't destroy items that touch it.
• If the player is sneaking, wearing Minecraft:Frost Walker–enchanted Minecraft:armor, or under the Template:EffectLink effect, it does not take damage.
• If the player dies by standing on it, a new death message appears: "player discovered that floor was lava".
  • If the player dies by the block, but after being damaged by a mob or player, the death message is: "player walked into danger zone due to entity".
• Removes water blocks on top when randomly ticked.
• It produces smoke Minecraft:particles under the Minecraft:rain.
• It emits as much Minecraft:light as it receives from other sources.
  • e.g. A magma block next to a torch emits light at level 13, as that was the light level it received from the torch.
    • If the Minecraft:torch is removed, magma block searches for the next brightest source of light; if no source is found then it doesn't produce light.

File:Nether Wart Block JE1.png Minecraft:Nether wart blocks

• Crafted by filling a 3×3 square in the crafting table with Minecraft:Nether wart.
  • It cannot be crafted back into Nether wart.
• It is broken by flowing Minecraft:water or Minecraft:lava, like most plants are.

File:Red Nether Bricks JE1 BE1.png Minecraft:Red Nether bricks

• Crafted by placing a 2×2 checkerboard of 2 Minecraft:Nether brick and 2 Minecraft:Nether wart.

File:Structure Void (item) JE1.png Minecraft:Structure voids

• Used for the structure block to keep the blocks in that location.
  • Intended to be a replacement for the function Minecraft:barrier blocks used to convey, so they can form part of the structure itself.
• They are invisible and have a small hitbox.
  • They are only visible when using the feature in (save) structure void.
• Allows for empty spaces in a structure.
  • Unlike air, it doesn't overwrite blocks where it is loaded.
  • Example: If the player loads a 2-block-high structure with air at the top and a structure void at the bottom into a 2-block-high area of stone, the top block becomes air but the bottom stays stone.

Items

Minecraft:Spawn eggs

• File:Cat Spawn Egg JE1.png Minecraft:Cat spawn egg
• File:Donkey Spawn Egg JE1 BE1.png Minecraft:Donkey spawn egg
• File:Elder Guardian Spawn Egg JE1 BE1.png Minecraft:Elder guardian spawn egg
• File:Husk Spawn Egg JE1 BE2.png Minecraft:Husk spawn egg
• File:Mule Spawn Egg JE1 BE1.png Minecraft:Mule spawn egg
• File:Polar Bear Spawn Egg JE1 BE1.png Minecraft:Polar bear spawn egg
• File:Skeleton Horse Spawn Egg JE1 BE1.png Minecraft:Skeleton horse spawn egg
• File:Stray Spawn Egg JE1 BE2.png Minecraft:Stray spawn egg
• File:Wither Skeleton Spawn Egg JE1 BE1.png Minecraft:Wither skeleton spawn egg
• File:Zombie Horse Spawn Egg JE1 BE2.png Minecraft:Zombie horse spawn egg

Mobs

File:Husk JE1 BE1.png Minecraft:Husks

• 80% of zombies spawned above ground in Minecraft:desert biomes, and their variants, are husks.
  • All spawns where the zombie does not have a view of the sky are normal zombies or zombie villagers.
• Behaves mostly like a regular zombie.
• Its ZombieType tag is 6.
• Does not burn in sunlight.
• Can spawn as a baby or as a chicken jockey.
• Applies 7 seconds of Template:EffectLink when attacking in Easy, 14 in Normal, and 21 in Hard difficulty.
• Visually 2 pixels taller than zombies, but has the same hitbox.

File:Polar Bear JE1 BE1.png Minecraft:Polar bears

• Adults and cubs spawn randomly as passive mobs in Minecraft:ice plains, Minecraft:ice mountains, and Minecraft:ice plains spikes.
• When hit, the adults attack the player, the cubs run away (very fast, similar to baby zombies).
  • Additionally, adults always attack the player when their cubs are around.
• Can swim faster in water than the player.
• Cubs follow their parents.
• Drops 0–2 Minecraft:raw fish (75% chance) or 0–2 Minecraft:salmon (25% chance), each increased by 1 per level of Minecraft:Looting.

File:Stray JE1 BE3.png Minecraft:Stray

• 80% of skeletons spawned above ground in Minecraft:ice plains biomes, and their variants, are strays.
  • All spawns where the skeleton does not have a view of the sky are normal skeletons.
  • Spiders spawned in cold biomes have a chance of having a stray riding it.
• Acts mostly like a regular skeleton.
• Its SkeletonType tag is 2.
• Drops are the same as skeletons, but also have a 50% chance to drop 0-1 tipped arrow of Template:EffectLink when killed by the player. With Looting, chance increases to Template:Frac.
• Shoots tipped arrows of Slowness (0:30) at the target.

World generation

Template:EnvLink

• Generates 15–24 blocks underground in Minecraft:deserts, Minecraft:swamplands, and their variants. Each chunk has a Template:Frac chance of generating a fossil.
• Composed of Minecraft:bone blocks and some Minecraft:coal ore, arranged as to resemble the skulls and spines of giant extinct creatures.
  • There are 4 variants of the skull, and 4 variants of the spine sections.

Command format

Minecraft:NBT format

• Template:Nbt: Determines the kind of Minecraft:zombie a specific zombie is.
  • 0: default, 1-5: villager, 6: Minecraft:husk.
  • This tag, in effect, unifies the characteristics of being a zombie, a specific zombie villager and a husk into a single variable.
  • Intended to replace the Template:Nbt and Template:Nbt tags.
    • These tags are kept for backward compatibility, but no newly generated entities have them.

Minecraft:Sound events

• Added block.enchantment_table.use.
• Added entity.polar_bear.ambient.
• Added entity.polar_bear.baby_ambient.
• Added entity.polar_bear.death.
• Added entity.polar_bear.hurt.
• Added entity.polar_bear.step.
• Added entity.polar_bear.warning.

General

Minecraft:Debug screen

• Template:Key toggles the visibility of Minecraft:chunk borders around the player.
  • Shows a blue outline for the chunk the player is currently in and a yellow outline for individual Minecraft:air blocks in the vicinity of the chunk.
    • The blue outline in particular, outlines the chunk horizontally on top of the solid blocks on the ground.
    • The outlines extends arbitrarily up, but ends at Minecraft:bedrock level.

Minecraft:Loot tables

• A new tag limit for the looting_enchant function.
  • It determines the maximum amount of mob drops the player can expect to receive when using the Looting enchantment of any level.

Minecraft:Options

• A new 'Auto-jump' toggle has been added, which automatically makes the player jump when running towards a one block tall obstacle.
  • Enabled by default, can be disabled in Minecraft:Options.

Minecraft:Particles

• A new fallingdust particle has been added.
  • Appears underneath gravity-affected blocks that are generated or placed suspended in midair.
  • Does not apply to Minecraft:dragon eggs.

Changes

Blocks

File:End Gateway JE3.gif End gateway block

• Colour palette has been adjusted.

File:End Portal JE4.gif End portal block

• Colour palette has been adjusted.

Minecraft:End stone bricks

• Are no longer craftable.

Minecraft:Structure blocks

• Are now available in item form; can be given or summoned.
  • Similarly to Minecraft:command blocks, its placement, destruction, and modification are restricted to opped players in Minecraft:Creative.
• Now comes with an integrated GUI and new textures.
• Has four modes:
  • Template:BlockSprite Save - build structure in world, tell the block where it is and it saves it to file.
  • Template:BlockSprite Load - loads saved structure files, replacing blocks with saved blocks except for Minecraft:structure void blocks.
  • Template:BlockSprite Corner - for automatic size calculation.
  • Template:BlockSprite Data - for chest markers and other blocks that require data (default).
• Structures are limited to a size of 32 blocks in each direction.
• The coordinates used by the blocks are relative to themselves.
• When in use, it shows the outline of the structure it relates to in white.
• Can rotate and mirror structures before they are placed.
• Small red and blue cubes can be displayed in the selection area.
  • Blue is for air blocks, red is for Minecraft:structure void blocks.
• Save and Load structure blocks can be activated by Minecraft:redstone.
• The game protects against maps saving arbitrarily massive amounts of data to disk.
• Display a name tag above them indicating their mode and structure name.
• New tags:
  • powered: Whether or not the structure block is currently being powered with redstone.
  • showboundingbox: Whether or not the bounding box of the structure is being outlined.
  • showair: Whether or not air blocks are indicated within the structure.

Items

Minecraft:Firework rockets

• Recipe now produces three rockets rather than only one.

Mobs

Minecraft:Endermen

• Can now rarely spawn in the Nether with a Template:Frac rate.
  • Compared to Template:Frac for zombie pigmen.
• Can now naturally pick up Minecraft:netherrack.

Minecraft:Magma cubes

• Spawn about twice as often in the Nether.
  • The rate is now Template:Frac, compared to Template:Frac before.

Minecraft:Zombies

• The "Zombie Generic Villager" is removed, due to the new zombietype tag.

World generation

Minecraft:Caves

• No longer turn adjacent Minecraft:sand blocks in the ceiling into Minecraft:sandstone when generating.

Minecraft:Ice plains and variants

• Don't spawn any other passive mobs than Minecraft:rabbits and the new Minecraft:polar bears anymore.
• Also have a lower chance of spawning passive mobs during world generation than other biomes (7% versus 10%).

Minecraft:Mesas and variants

• Minecraft:Terracotta and the dyed forms of terracotta no longer generate more than 15 blocks deep, if the mesa is more than 15 blocks above sea level.
• In addition to the normal 2 blobs of Minecraft:gold ore below Y=32, attempts to generate 20 blobs between Y=32 and Y=79.
• Generate the new type of Minecraft:mineshafts, described below.

Minecraft:Mineshafts

• New mineshaft type that generates in mesa biomes (including all variants).
  • Placed so that the midpoint of the structure is near sea level, rather than so that the top is 10 blocks or more below sea level.
  • Uses dark oak wood for wooden structures.
  • New tag MST on mineshaft structure pieces to indicate the type. 0 is the traditional mineshaft, 1 is the new mesa mineshaft.
• Features generate differently if above ground (i.e. the sky light where they generate is 8 or more). This is not dependent on mineshaft type.
  • Cave spider spawners no longer generate if sky light is 8 or more.
  • Various wooden pieces no longer generate if the block above is air and/or if sky light is 8 or more.
  • Rails in corridors are more complete if sky light is below 8.
    • 90%, versus 70% in 1.9 and in above-ground corridors.

Minecraft:Plains and Minecraft:sunflower plains

• Now have some trees in 5% of its chunks (Template:Frac large oaks, Template:Frac normal oaks).

Minecraft:Villages

• Village structures are no longer restricted by Minecraft:biome boundaries.
  • Meaning that a village that starts in a valid biome can now spread into an adjacent invalid biome.
• Now generate in taigas (but not variants).
  • They are made with spruce Minecraft:log.
• Savanna villages are now made with acacia wood instead of oak.
  • In savannas, acacia logs replace cobblestone in all structures except churches.
• Paths no longer generate below sea level, and in non-desert villages they are made with different material depending on the existing terrain.
  • If replacing Minecraft:grass blocks, the path is made from Minecraft:grass path blocks.
  • If replacing Minecraft:water or Minecraft:lava, the path is made from Minecraft:planks.
  • Otherwise, the path is gravel on top of cobblestone (including bridges across ravines).
  • Sandstone paths still always generate in Minecraft:desert villages.
• They have a 2% chance of being a zombie village, determined by Zombie tag in Village.dat.
  • All generated villagers are instead Minecraft:zombie villagers.
  • There are no Minecraft:doors or Minecraft:torches in the village.

Command format

NBT format

• NoGravity now works for all Minecraft:entities, not only Minecraft:armor stands.
  • A mob in midair affected by it, still responds to knockback by moving horizontally.
    • Although the AI doesn't permit any mob to move on their own, Minecraft:horses and Minecraft:pigs ridden by the player move normally.
      • Very similarly, Minecraft:boats in the Minecraft:air ridden by the player move as if they were in Minecraft:water.

Gameplay

Minecraft:Huge mushrooms

• Huge mushrooms have a Template:Frac chance of generating twice as tall as normal.
  • These new mushrooms, which can be up to 13 blocks tall, can appear during world generation or by being planted by the player.

Fixes

More fixes

• Fixed some broken uses of relative coordinates.<ref name="16w20a-blog"/>

Trivia

• 16w20a was previously removed from the Minecraft:launcher for some time, but was added back in September 2018.
• This snapshot was released on the same day as Minecraft:Pocket Edition v0.14.3 alpha.